We did not change the initial 3 year free time period.

我们没有改变最初的3年免费时间。

youdao

Flex Builder is a commercial product, but it has a long free trial period that will give you enough time to figure out if it's worth your money.

Flex Builder是个商业产品，但它有很长的免费试用阶段，能让你有足够时间想清楚是不是值得掏这个钱。

youdao

At the same time I am free to recognise that the writings of that period were pervaded with an enthusiasm the value of which cannot be small.

同时我也可以直率地承认我那时期的作品，充满着一腔热情，而这热情的价值决不是细微的。

youdao

New users will be able to test the service for a limited time period for free, and it will be included for all existing Spotify Premium users with a compatible Samsung internet-connected Smart TV.

ENGADGET: Samsung partners with Spotify, brings streaming music to its 2012 Smart TVs in Europe

Feel free to recycle them for any time period you like.

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This workaround relies on the fact that Microsoft is currently offering, for a time limited period, free upgrades for the Media Center add-on, and it is this process that is flawed because Microsoft does not check the validity of the original key used to activate the copy of Windows 8 Pro before dishing out another key.

FORBES: Microsoft Blunder Gives Pirates Free Copies Of Windows 8 Pro